Weight rack attachment



FIG. 1 is a top, front, left perspective view of a weight rack attachment, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines immediately adjacent to the shaded areas define the bounds of the claimed design and form no part thereof. The broken lines depicting the remainder of the article show features that form no part of the claimed design. 

CLAIM The ornamental design for a weight rack attachment, as shown and described. 